2013/06/30 by Kalpataru Pradhan, A. P. Kampf, Arno P. Kampf · 14 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Colossal magnetoresistance #Condensed matter physics #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetism #Magnetization #Magnetoresistance #Manganite #Materials science #Physics #Quantum mechanics #Quantum tunnelling #Rare-earth and actinide compounds #Superexchange #Superlattice #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.88.115136
published in Physical Review B 88(11) (American Physical Society) · 5 pages, 5 figures. To appear in PRB
arxiv created 2013/09/16 · openalex publication_date 2013/09/23 · arxiv updated 2017/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use a two-orbital double-exchange model including superexchange interactions, Jahn-Teller lattice distortions, and long-range Coulomb interactions to investigate the origin of magnetically disordered interfaces between ferromagnetic metallic (FM) and antiferromagnetic insulating (AFI) manganites in FM/AFI superlattices. The induced magnetic moment in the AFI layer varies nonmonotonically with increasing AFI layer width as seen in the experiment. We provide a framework for understanding this nonmonotonic behavior which has a one-to-one correspondence with the magnetization of the FM interface. The obtained insights provide a basis for improving the tunneling magnetoresistance in FM/AFI manganite superlattices by avoiding a magnetic dead layer in the FM manganite.